WO2016206886A1 - Procédé et dispositif permettant de déterminer un point de fonctionnement efficace sur le plan énergétique - Google Patents

Procédé et dispositif permettant de déterminer un point de fonctionnement efficace sur le plan énergétique Download PDF

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Publication number
WO2016206886A1
WO2016206886A1 PCT/EP2016/061530 EP2016061530W WO2016206886A1 WO 2016206886 A1 WO2016206886 A1 WO 2016206886A1 EP 2016061530 W EP2016061530 W EP 2016061530W WO 2016206886 A1 WO2016206886 A1 WO 2016206886A1
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WO
WIPO (PCT)
Prior art keywords
machine tool
machine
cycle time
energy
operating point
Prior art date
Application number
PCT/EP2016/061530
Other languages
German (de)
English (en)
Inventor
Yiwen Xu
Herman Yakaria
Tobias Kösler
Thomas Ackermann
Johannes Bauer
Original Assignee
Zf Friedrichshafen Ag
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Zf Friedrichshafen Ag filed Critical Zf Friedrichshafen Ag
Priority to EP16726056.1A priority Critical patent/EP3314341B1/fr
Priority to US15/738,254 priority patent/US20180196411A1/en
Priority to JP2017567082A priority patent/JP6993239B2/ja
Publication of WO2016206886A1 publication Critical patent/WO2016206886A1/fr

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Classifications

    • G—PHYSICS
    • G05—CONTROLLING; REGULATING
    • G05B—CONTROL OR REGULATING SYSTEMS IN GENERAL; FUNCTIONAL ELEMENTS OF SUCH SYSTEMS; MONITORING OR TESTING ARRANGEMENTS FOR SUCH SYSTEMS OR ELEMENTS
    • G05B19/00—Programme-control systems
    • G05B19/02—Programme-control systems electric
    • G05B19/418—Total factory control, i.e. centrally controlling a plurality of machines, e.g. direct or distributed numerical control [DNC], flexible manufacturing systems [FMS], integrated manufacturing systems [IMS] or computer integrated manufacturing [CIM]
    • G—PHYSICS
    • G05—CONTROLLING; REGULATING
    • G05B—CONTROL OR REGULATING SYSTEMS IN GENERAL; FUNCTIONAL ELEMENTS OF SUCH SYSTEMS; MONITORING OR TESTING ARRANGEMENTS FOR SUCH SYSTEMS OR ELEMENTS
    • G05B19/00—Programme-control systems
    • G05B19/02—Programme-control systems electric
    • G05B19/418—Total factory control, i.e. centrally controlling a plurality of machines, e.g. direct or distributed numerical control [DNC], flexible manufacturing systems [FMS], integrated manufacturing systems [IMS] or computer integrated manufacturing [CIM]
    • G05B19/41865—Total factory control, i.e. centrally controlling a plurality of machines, e.g. direct or distributed numerical control [DNC], flexible manufacturing systems [FMS], integrated manufacturing systems [IMS] or computer integrated manufacturing [CIM] characterised by job scheduling, process planning, material flow
    • G05B19/4187—Total factory control, i.e. centrally controlling a plurality of machines, e.g. direct or distributed numerical control [DNC], flexible manufacturing systems [FMS], integrated manufacturing systems [IMS] or computer integrated manufacturing [CIM] characterised by job scheduling, process planning, material flow by tool management
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23Q—DETAILS, COMPONENTS, OR ACCESSORIES FOR MACHINE TOOLS, e.g. ARRANGEMENTS FOR COPYING OR CONTROLLING; MACHINE TOOLS IN GENERAL CHARACTERISED BY THE CONSTRUCTION OF PARTICULAR DETAILS OR COMPONENTS; COMBINATIONS OR ASSOCIATIONS OF METAL-WORKING MACHINES, NOT DIRECTED TO A PARTICULAR RESULT
    • B23Q15/00—Automatic control or regulation of feed movement, cutting velocity or position of tool or work
    • B23Q15/007—Automatic control or regulation of feed movement, cutting velocity or position of tool or work while the tool acts upon the workpiece
    • B23Q15/14—Control or regulation of the orientation of the tool with respect to the work
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23Q—DETAILS, COMPONENTS, OR ACCESSORIES FOR MACHINE TOOLS, e.g. ARRANGEMENTS FOR COPYING OR CONTROLLING; MACHINE TOOLS IN GENERAL CHARACTERISED BY THE CONSTRUCTION OF PARTICULAR DETAILS OR COMPONENTS; COMBINATIONS OR ASSOCIATIONS OF METAL-WORKING MACHINES, NOT DIRECTED TO A PARTICULAR RESULT
    • B23Q17/00—Arrangements for observing, indicating or measuring on machine tools
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23Q—DETAILS, COMPONENTS, OR ACCESSORIES FOR MACHINE TOOLS, e.g. ARRANGEMENTS FOR COPYING OR CONTROLLING; MACHINE TOOLS IN GENERAL CHARACTERISED BY THE CONSTRUCTION OF PARTICULAR DETAILS OR COMPONENTS; COMBINATIONS OR ASSOCIATIONS OF METAL-WORKING MACHINES, NOT DIRECTED TO A PARTICULAR RESULT
    • B23Q41/00—Combinations or associations of metal-working machines not directed to a particular result according to classes B21, B23, or B24
    • B23Q41/08—Features relating to maintenance of efficient operation
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23Q—DETAILS, COMPONENTS, OR ACCESSORIES FOR MACHINE TOOLS, e.g. ARRANGEMENTS FOR COPYING OR CONTROLLING; MACHINE TOOLS IN GENERAL CHARACTERISED BY THE CONSTRUCTION OF PARTICULAR DETAILS OR COMPONENTS; COMBINATIONS OR ASSOCIATIONS OF METAL-WORKING MACHINES, NOT DIRECTED TO A PARTICULAR RESULT
    • B23Q5/00—Driving or feeding mechanisms; Control arrangements therefor
    • B23Q5/54—Arrangements or details not restricted to group B23Q5/02 or group B23Q5/22 respectively, e.g. control handles
    • G—PHYSICS
    • G05—CONTROLLING; REGULATING
    • G05B—CONTROL OR REGULATING SYSTEMS IN GENERAL; FUNCTIONAL ELEMENTS OF SUCH SYSTEMS; MONITORING OR TESTING ARRANGEMENTS FOR SUCH SYSTEMS OR ELEMENTS
    • G05B19/00—Programme-control systems
    • G05B19/02—Programme-control systems electric
    • G05B19/418—Total factory control, i.e. centrally controlling a plurality of machines, e.g. direct or distributed numerical control [DNC], flexible manufacturing systems [FMS], integrated manufacturing systems [IMS] or computer integrated manufacturing [CIM]
    • G05B19/41865—Total factory control, i.e. centrally controlling a plurality of machines, e.g. direct or distributed numerical control [DNC], flexible manufacturing systems [FMS], integrated manufacturing systems [IMS] or computer integrated manufacturing [CIM] characterised by job scheduling, process planning, material flow
    • G—PHYSICS
    • G07—CHECKING-DEVICES
    • G07C—TIME OR ATTENDANCE REGISTERS; REGISTERING OR INDICATING THE WORKING OF MACHINES; GENERATING RANDOM NUMBERS; VOTING OR LOTTERY APPARATUS; ARRANGEMENTS, SYSTEMS OR APPARATUS FOR CHECKING NOT PROVIDED FOR ELSEWHERE
    • G07C3/00—Registering or indicating the condition or the working of machines or other apparatus, other than vehicles
    • G07C3/08—Registering or indicating the production of the machine either with or without registering working or idle time
    • G07C3/10—Registering or indicating the production of the machine either with or without registering working or idle time using counting means
    • G—PHYSICS
    • G05—CONTROLLING; REGULATING
    • G05B—CONTROL OR REGULATING SYSTEMS IN GENERAL; FUNCTIONAL ELEMENTS OF SUCH SYSTEMS; MONITORING OR TESTING ARRANGEMENTS FOR SUCH SYSTEMS OR ELEMENTS
    • G05B2219/00—Program-control systems
    • G05B2219/20—Pc systems
    • G05B2219/25—Pc structure of the system
    • G05B2219/25289—Energy saving, brown out, standby, sleep, powerdown modus for microcomputer
    • G—PHYSICS
    • G05—CONTROLLING; REGULATING
    • G05B—CONTROL OR REGULATING SYSTEMS IN GENERAL; FUNCTIONAL ELEMENTS OF SUCH SYSTEMS; MONITORING OR TESTING ARRANGEMENTS FOR SUCH SYSTEMS OR ELEMENTS
    • G05B2219/00—Program-control systems
    • G05B2219/20—Pc systems
    • G05B2219/25—Pc structure of the system
    • G05B2219/25387—Control sequences so as to optimize energy use by controlled machine
    • G—PHYSICS
    • G05—CONTROLLING; REGULATING
    • G05B—CONTROL OR REGULATING SYSTEMS IN GENERAL; FUNCTIONAL ELEMENTS OF SUCH SYSTEMS; MONITORING OR TESTING ARRANGEMENTS FOR SUCH SYSTEMS OR ELEMENTS
    • G05B2219/00—Program-control systems
    • G05B2219/30—Nc systems
    • G05B2219/39—Robotics, robotics to robotics hand
    • G05B2219/39407—Power metrics, energy efficiency
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
    • Y02P70/00—Climate change mitigation technologies in the production process for final industrial or consumer products
    • Y02P70/10—Greenhouse gas [GHG] capture, material saving, heat recovery or other energy efficient measures, e.g. motor control, characterised by manufacturing processes, e.g. for rolling metal or metal working
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
    • Y02P80/00—Climate change mitigation technologies for sector-wide applications
    • Y02P80/10—Efficient use of energy, e.g. using compressed air or pressurized fluid as energy carrier
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
    • Y02P90/00—Enabling technologies with a potential contribution to greenhouse gas [GHG] emissions mitigation
    • Y02P90/02—Total factory control, e.g. smart factories, flexible manufacturing systems [FMS] or integrated manufacturing systems [IMS]

Definitions

  • the present invention relates to a method for determining an energy-efficient operating point according to the preamble of claim 1, a device for determining an energy-efficient operating point according to the preamble of claim 12 and a machine tool system.
  • DE 1 1 2009 004 354 T5 discloses a system and a method for reducing an idle power outflow.
  • a machine has a plurality of electronic control devices, which are electrically connected to an electrical power source on the one hand via a first electrical circuit through a first relay and on the other hand via a second electrical circuit through a second relay.
  • a relay control device is connected to the electric power source via a third electric circuit and simultaneously communicates with the first and second relays.
  • the relay control device is configured to open or close the first relay or the second relay in response to a power request indication.
  • DE 10 2004 030 312 A1 discloses a power tool control device for a power tool.
  • the control device is acted upon during a labor input of the power tool with the full mains voltage, while it is supplied in the idle state only with a significantly reduced voltage.
  • the control device at rest receives just enough voltage to be able to execute a standby function.
  • the standby function can consist, for example, of the electrical supply of a microcontroller or of electronics for regulating the speed of the power tool. This reduces the load on the control device and improves the efficiency.
  • the idle state thus represents a power-saving mode of the power tool to keep the power consumption away from the labor of the power tool as low as possible.
  • the known devices and methods are disadvantageous in that they concentrate on the energy consumption of only a single machine tool without taking into account their integration into a system of several machine tools and, in particular, without considering their energetic interaction with the system. Possible energy savings through a better coordination of the machine tool with each other therefore remain largely unconsidered.
  • the invention relates to a method for determining an energy-efficient operating point of a machine tool of a machine tool system, wherein the machine tool feeds the same workpieces in time sequence for processing.
  • the machine tool has an operating point-dependent machine cycle time and an operating point-dependent power requirement, wherein the machine tool system comprises at least two machine tools and has a system cycle time and wherein the machine cycle time is less than the system cycle time.
  • the method according to the invention is characterized in that the energy-efficient operating point is determined in accordance with an energy requirement characteristic of the machine tool, the energy requirement characteristic representing a machine cycle time-dependent energy requirement of the machine tool over the system cycle time.
  • the energy requirement identification function thus represents the energy requirement of the machine tool as a function of the machine cycle time
  • an energy-efficient operating point of the machine tool can be determined comparatively easily on the basis of the energy requirement identification function.
  • the energy requirement identification function can be determined, for example, experimentally by means of a series of experiments or also mathematically on the basis of known properties of the machine tool.
  • the energy demand detection function the power demand of the machine tool over the system clock time, i.
  • the time duration of a system cycle time not only is an isolated optimization of the energy requirement of the individual machine tool carried out during the machine cycle time, but rather an optimization of the energy requirement of the machine tool with regard to its embedding in the complete machine tool system and its interaction with the complete machine tool system ,
  • the term "operating point” is understood to mean the power consumption of the machine tool depending on the machine cycle time of the machine tool. This means that the power requirement of the machine tool is generally comparatively high, whereas the machine cycle time of the machine tool is generally comparatively low , Thus, as opposed to a reduced power consumption but a prolonged machine cycle time and thus an extended temporal power consumption, a reduction of the operating point does not necessarily lead to a more energy-efficient operating point.
  • machine cycle time is understood to mean the duration of time which the machine tool requires to machine a single workpiece.
  • system cycle time is understood to mean the duration of time required by the machine tool system for processing a single workpiece
  • the system cycle time is generally decisively characterized by the longest machine cycle time of the machine tools covered by the machine tool system the machine tool system of workpieces per unit time.
  • the term "energy-efficient operating point” is understood to mean the operating point of the machine tool at which it has the lowest overall energy requirement in terms of its integration into the complete machine tool system, ie, in conjunction with further machine tools of the machine tool system, without the operating points of the machine tool
  • the "energy-efficient operating point” therefore does not necessarily designate the overall most energy-efficient operating point of the machine tool, but merely the energy-efficient operating point of the machine tool that can be achieved without influencing other machine tools of the machine tool system. Since a factory drawing machine system usually comprises a large number of tool traction machines whose interaction has been lengthy and finely tuned in order to enable the most robust and complication-free production process, the method according to the invention is preferably limited to the stated frame.
  • the term “machine tool” is understood to mean any type of machine that is capable of processing a workpiece, for example, the machine tool may be designed to cast, to file, to mill, to drill, the workpiece, to paint or to heat.
  • the energy requirement characteristic function is determined by using a machine cycle time-dependent power requirement characteristic curve.
  • a change in the operating point of the machine tool leads, as already described, on the one hand to a change in the power requirement of the machine tool during the machine cycle time and on the other hand to a change in the machine cycle time.
  • the machine tool is usually in a sleep mode, which lasts until the end of the system cycle time, ie the time difference between system cycle time and machine cycle time lasts. In this sleep mode, the machine tool has a largely constant and in particular machine cycle time independent power requirement.
  • the use of the machine cycle time-dependent power requirement curve as the basis for determining the energy demand characteristic thus leads to a loadable energy demand characteristic, since the energy demand characteristic thus describes the energy demand of the machine tool with regard to their integration into the machine tool system.
  • the energy requirement of the machine tool results over the machine cycle time.
  • This energy requirement during the machine cycle time represents the main part of the total energy demand of the machine tool during the system cycle time. If the machine cycle time-dependent power requirement of the machine tool is integrated over the system cycle time, the complete energy requirement of the machine tool results over the system cycle time.
  • the power demand characteristic is a straight line which is determined by detecting different operating points and adjusting the straight line to the different operating points.
  • the power requirement characteristic is recorded experimentally. As a rule, this leads to the maintenance of a reliable and practical power requirement curve.
  • the straight line which represents the power demand characteristic, has a negative sign.
  • the term "adapting the straight line” is understood to mean that the power requirement curve or the straight line is optimally fitted by the different operating points or by the machine cycle times and power requirements represented by the different operating points.
  • the energy requirement characteristic thus describes the machine cycle time-dependent energy requirement of the machine tool during the system cycle time in the form of a downwardly open parabola. In fact, it has been found that such a certain energy demand characteristic is reliably suitable for determining the energy-efficient operating point of the machine tool.
  • the idle time is the sum over all those times in which the machine tool is not in a working mode.
  • the idle time can include, for example, the time in a so-called. Basic mode, a so-called secondary mode and a so-called. Standby mode, each of the modes mentioned has an individual power requirement of the machine tool. Usually the machine tool moves with increasing rest time more and more work- Machine components down to allow for further energy savings, and thus gradually approaches the standby mode, which usually has the lowest power requirement. If, for example, the machine tool is a grinding machine for grinding gear toothings, it is possible to switch to the secondary mode immediately when the idle time arrives.
  • the machine tool In the secondary mode, initially only the axle drives which hold the gear to be ground and move in accordance with the requirements of the grinding process are switched off. As the idle time progresses, the machine tool can then enter the basic mode. In the basic mode, the main spindle is deactivated and the pneumatic and hydraulic components of the machine tool are switched off. Finally, as the idle time progresses, cooling systems and electronic control systems of the machine tool can also be turned off. Thus, the power requirement of the machine tool during the rest period is gradually reduced gradually.
  • an intersection of the parabola with the system clock time is determined and that an imaginary horizontal is placed through the intersection. This has proved to be a particularly suitable intermediate step on the way to reliable determination of the energy-efficient operating point of the machine tool.
  • the operating point of the machine tool is placed on the intersection, when the machine cycle time-dependent energy demand of the machine tool is above the horizontal. This corresponds to a reduction of the operating point. It has been shown that in this case a reduction of the working point to the point of intersection, a reduction in the energy consumption of the machine tool is possible, although the machine cycle time, ie the time in which the machine tool is in working mode and has a comparatively high power consumption, is thereby extended. According to a further particularly preferred embodiment of the invention, it is provided that the energy-efficient operating point is determined while maintaining the system cycle time. Thus, the inventive method thus advantageously does not lead to an extension of the system cycle time and thus not to a slowing down of the production of workpieces. Rather, the system cycle time and thus the throughput of workpieces of the machine tool system per unit time is maintained.
  • the energy-efficient operating point is determined with regard to an electrical energy requirement of the machine tool. Since the electrical energy requirement usually makes up the main part of the total energy requirement of equivalent machine tools, the invention advantageously focuses on this. In addition, the electrical energy requirement can be measured and controlled comparatively easily. In particular, the energy-efficient operating point of the machine tool is not determined with regard to a gas, oil or coal-based energy requirement.
  • the method is repeated for each machine tool whose machine cycle time is less than the system cycle time.
  • the actual operating point of each machine tool can then be adapted to the determined energy-efficient operating point.
  • an energy-efficient operating point is thus determined for the machine tool system as a whole.
  • the method according to the invention thus enables not only an energy saving on a single machine tool, but rather on the complete machine tool system, which may include a plurality of machine tools.
  • the machine tool system is designed to machine the workpieces. Since the machining of workpieces is particularly energy-consuming, can be realized by the inventive method, a large energy savings.
  • all of the at least two machine tools are designed to machine the workpieces.
  • the machine tool system is designed to grind the workpieces and / or milling and / or rotating.
  • the method according to the invention has proved to be particularly advantageous and energy-efficient with regard to the possible energy savings.
  • a grinding process or a milling process or a turning process usually comprise a roughing process and a subsequent finishing process.
  • the roughing process comprises the lifting of material from the workpieces with a comparatively large chip volume.
  • the roughing process serves to approach the workpiece of the desired final contour as far as possible within the shortest possible processing time. Accordingly, roughing tools are usually comparatively coarse-toothed tools with a large cutting depth.
  • the roughing process usually leaves a comparatively rough surface with only a small dimensional accuracy. The exact and desired final contour of a workpiece, however, is generated in the subsequent finishing process.
  • Finishing tools are therefore usually much finely toothed and have a relatively lower depth of cut, so that a comparatively smoother surface is achieved.
  • the machine tool system is designed to Grinding and / or milling gears. Since just the grinding or milling of gear teeth is particularly energy-consuming, arise here by the inventive method great opportunities for energy savings.
  • the operating point is determined by a roughing time and a roughing performance.
  • the invention thus concentrates thus preferably on the roughing process, since this on the one hand has the greatest energy expenditure and on the other hand can be changed without regard to the surface roughness of the workpiece produced, since the surface roughness or contour accuracy is generated anyway desired only in the following finishing process.
  • the operating point is preferably not determined by a finishing time and a finishing performance. Changing the finishing time and sizing performance would have a direct impact on the quality of the work piece produced. However, the requirements for the workpiece quality are usually fixed. However, although changing the sizing time and sizing performance could result in energy savings, this would generally have undesirable effects on workpiece quality.
  • the invention further relates to a device for determining an energy-efficient operating point of a machine tool of a machine tool system, the machine tool in time sequence equal workpieces are fed for processing, wherein the workpiece machine system comprises at least two machine tools and having a system cycle time, wherein the device is adapted to means of time detection means an operating point-dependent engine cycle time and by means of power detection means to detect an operating point-dependent power requirement of the machine tool and wherein the machine cycle time is less than the system cycle time.
  • the device according to the invention is characterized in that the device is designed to determine the energy-efficient operating point by means of determination means in accordance with an energy requirement characteristic of the machine tool, the energy requirement characteristic function represents a machine cycle time-dependent energy demand of the machine tool over the system cycle time. Since the device according to the invention thus comprises all means necessary for carrying out the method according to the invention, it enables the advantages already described in connection with the method according to the invention.
  • the time recording means may be, for example, a quartz-based clock whose clock signals have a predetermined time interval and are counted by a counter and added up.
  • the counter in turn, may be implemented as an electronic counter and may be e.g. be integrated into an electronic calculator, in particular a microcontroller.
  • the power detection means may be, for example, known voltage detection means and known current detection means.
  • both the voltage detection means and the current detection means may detect the voltage or the current at predetermined time intervals and mathematically determine the power consumed by the machine tool from the detected current and the detected voltage.
  • the power detection means may further comprise, for example, an electronic calculating unit, which multiplies the detected current with the detected voltage and then normalizes the value thus determined to one second in order to determine the power consumption of the machine tool.
  • the determination means can also be designed, for example, as an electronic arithmetic unit, in particular as a microcontroller.
  • the electronic arithmetic unit preferably has electronic storage means attached to it at the data level, to which the electronic arithmetic unit can read and write access.
  • the determination means are further configured to read the time detection means and the power detection means.
  • the determining means may execute a software algorithm designed for this purpose, wherein the software algorithm instructs the determining means or the device to carry out the method according to the invention.
  • the software algorithm is preferably stored in the electronic storage means.
  • the device is structurally and functionally integrated into the machine tool system.
  • the device according to the invention may also be made structurally and functionally detached from a machine tool system. In the latter case, for example, via a wired data connection necessary for carrying out the method according to the invention connection to the machine tool system can be made.
  • the device is structurally and functionally integrated in one of the machine tools of the machine tool system. Since many machine tools often already include a complex and powerful control electronics, the device can also be structurally and functionally integrated into such a machine tool.
  • the term "functionally integrated" is understood to mean that the device accesses hardware and means already present in the machine tool system or in a machine tool in order to use them for carrying out the method according to the invention. According to a further preferred embodiment of the invention, it is provided that the device is designed for carrying out the method according to the invention. This results in the advantages already mentioned.
  • the invention also relates to a machine tool system comprising a device according to the invention.
  • the advantages mentioned in connection with the device according to the invention thus also result with regard to the machine tool system according to the invention.
  • FIG. 1 shows by way of example and schematically a possible embodiment of a machine tool system according to the invention
  • FIG. 6 shows an exemplary embodiment of a method according to the invention in the form of a flowchart.
  • FIG. 1 shows by way of example and schematically a possible embodiment of a machine tool system 1 according to the invention.
  • the machine tool system 1 illustrated by way of example comprises three machine tools 2, 3 and 4.
  • the machine tool 2 in turn comprises a control unit 7.
  • the control unit 7 in turn comprises, for example, time recording means 12, power detection means 13 and an electronic calculating unit 21.
  • the machine tool 3 comprises a control unit 8, which in turn comprises time detection means 14, power detection means 15 and an electronic calculating unit 22.
  • the machine tool 4 finally comprises a control unit 9.
  • the control unit 9 in turn comprises time recording means 16, power detection means 17 and an electronic calculating unit 23.
  • a device 24 according to the invention for determining an energy-efficient operating point of a machine tool of a machine tool system is integrated into the control unit 9 structurally and functionally according to the invention.
  • the control unit 9 and the device 24 are identical thereto.
  • the electronic arithmetic unit 23 is used accordingly not only for controlling and regulating the machine tool 4, but also as determining means 23 of the device 24.
  • the electronic arithmetic unit 23 also not shown storage means are attached to the data level.
  • the time detection means 16 and the power detection means 17 of the control unit 9 also serve as time detection means 16 and the power detection means 17 of the apparatus 24.
  • the machine tool system 1 shown by way of example also comprises a conveyor belt 6 on which workpieces 5 are arranged.
  • the workpieces 5 are the same, ie identical workpieces 5, which are for example designed as metallic cylinders.
  • the workpieces 5 are supplied in chronological order of the machine tool 2, the machine tool 3 and the machine tool 4.
  • the machine tool 2 has a machine cycle time, which is, for example, 20 s.
  • the machine tool 2 requires 5 s for the machining of a workpiece 5.
  • the machine tool 2 carries out a milling operation on the workpiece. 5 and is operated at maximum power. This means that it is operated at the highest possible operating point 31, 44, 45, 46.
  • the workpiece 5 is fed to the machine tool 3 via the conveyor belt 6.
  • the machine tool 3 has, for example, a machine cycle time of 1 6 s, which means that the processing time of the machine tool 3 for a workpiece 5 1 6 s.
  • the machine tool 3 is operated at maximum power, which corresponds to the maximum operating point 31, 45, 46.
  • the machine tool 3 is a grinding machine which performs a roughing operation and a finishing operation on the workpieces 5.
  • the machine tool 4 has, for example, a machine cycle time of 18 s, which means that it requires 5 s for the machining of a workpiece 5.
  • the machine tool 4 is operated according to the example with maximum power, ie at the maximum operating point 44.
  • the machine tool 4 is a furnace which thermally treats the workpieces 5. Since the system cycle time ti, ie the total machining time for a workpiece 5 is characterized by the workpiece machine system 1, for example by the largest machine cycle time or corresponds to this, the system cycle time ti is thus 20 s.
  • control unit 9 comprises the time detection means 16, the power detection means 17 and the determination means 18, it corresponds, as already described, to the device 24 according to the invention. According to the example, it also carries out the method according to the invention.
  • the control unit 9 or the device 24 initially varies the operating point 31, 44, 45, 46 of the machine tool 3.
  • the change in its operating point 31, 44, 45, 46 also changes the power requirement of the machine tool 3
  • the operating point 31, 44, 45, 46 is defined in each case by the power requirement of the machine tool 3 at a given machine cycle time of the machine tool 3.
  • the device 24 thus detects the different operating points 31, 44, 45, 46 of the Machine tool 3 and adapted by calculation a straight line 30 through the different operating points 31, 44, 45, 46 at.
  • This straight line 30 represents a machine cycle time-dependent power requirement curve 30.
  • the device 24 now determines a machine cycle time-dependent energy demand characteristic 40, which is referred to as parabola 40 is trained.
  • the machine cycle time-dependent energy requirement characteristic 40 represents the energy requirement of the machine tool 3 as a function of the machine cycle time of the machine tool 3.
  • the device 9 determines an intersection point 42 on the parabola 40 with the system cycle time t-1.
  • the device 9 therefore adapts the working point 31, 45, 46 of the machine tool 3 in such a way that it now lies on the point of intersection 42. Accordingly, the machine cycle time of the machine tool 3 changes to 20 seconds. This leads to an energy saving of the machine tool 3.
  • the control unit 9 or the device 24 performs the inventive method in an identical manner again for the machine tool 4. It follows that a standard selected maximum operating point 44 of the machine tool 4 below the horizontal 48 is located on the parabola 40.
  • the system cycle time ti is maintained according to the example in order not to delay the production or processing of the workpieces 5, as described, a change of the operating point 31, 44, 45, 46 of the machine tool 2 is dispensed with.
  • the machine tools 2, 3 and 4 thus each operate in an energy-efficient operating point 31, 44, 45, 46 while maintaining the system cycle time ti of 20 s.
  • the machine tool system 1 operates in an energy-efficient operating point.
  • the device 24 according to the invention is constructive, ie structurally independent of the machine tools 2, 3 and 4.
  • the device 24 is connected to the control units via suitable data links 10 7, 8 and 9 of the machine tools 2, 3 and 4 connected.
  • the device 24 according to the invention is thus structurally independent of the machine tools 2, 3, and 4, it is nevertheless functionally partially integrated in this respect insofar as it is present in the machine tools 2, 3 and 4 time recording means 12, 14 and 1 respectively 6 and in the machine tools 2, 3 and 4 existing power detection means 13, 15 and 17, respectively, for carrying out the method according to the invention.
  • FIG. 3 shows, by way of example and schematically, a machine cycle time-dependent power requirement curve 30, which is designed as a straight line 30.
  • the power requirement curve 30 was determined by previously detecting different operating points 31 of a machine tool 2, 3 or 4.
  • the power requirement curve 30 is plotted in a coordinate system which represents the machine cycle time on its x-axis and represents the power requirement on its y-axis.
  • the power demand curve 30 was determined by fitting, ie by fitting, the straight line 30 through the different operating points 31.
  • the straight line 30 decreases with increasing machine cycle time, which means that the power requirement during the machine cycle time is reduced as the cycle time of the machine increases. Since the straight line 30 thus decreases with increasing machine cycle time, the slope of the associated straight line equation accordingly has a negative sign.
  • the mathematical determination of the straight line equation for the slope m of the power requirement curve 30 gives a value of -5 and for the intercept b of the power requirement curve 30 a value of 8.
  • the straight line equation defined in this way can now be used to determine the machine cycle time-dependent energy demand characteristic 40.
  • 4 shows, by way of example, a machine cycle time-dependent energy requirement characteristic 40 of a machine tool 2, 3 or 4.
  • the energy requirement characteristic 40 describes the energy requirement of the machine tool 2, 3 or 4 over the system cycle time ti and is designed, for example, as a downwardly opened parabola 40.
  • the energy requirement identification function 40 clearly shows that the energy requirement of the machine tool 2, 3 or 4 is greatest at average power requirement and average engine cycle time, whereas energy savings are possible with low power requirement and correspondingly long machine cycle time and conversely with high power requirement and correspondingly short machine cycle time.
  • the energy demand characteristic 40 shown by way of example is shown in a coordinate system whose x-axis indicates the machine cycle time and whose y-axis indicates the energy requirement of the machine tool 2, 3 or 4 during the system cycle time ti.
  • the time ti denotes the system clock time t-
  • the curve of the parabola 40 describes by way of example different operating points 44, 45, 46 of an associated machine tool 2, 3 or 4. In the case of the operating point 44, the machine cycle time is comparatively short.
  • the energy requirement 50 is, as can be seen, made up of the services 52, 55, 58, 61 required in the different operating modes of a machine tool 2, 3 and 4, respectively, as well as the times 53, 56, 59, 62 spent in the different operating modes together.
  • the total energy 50 is composed, for example, of a partial energy 51 in the processing mode, the partial energy 51 resulting from a power 52 required in the processing mode and the machine cycle time 53.
  • the total energy 50 is composed of a partial energy 54, which the machine tool 2, 3 or 4 requires in the secondary mode.
  • the partial energy 54 results from a power 55 required in the secondary mode and a time 56 spent in the secondary mode. Furthermore, the total energy 50 is composed of a partial energy 57 which the machine tool 2, 3 or 4 requires in the idling mode. The part-energy 57, in turn, results from the power 58 required in idling mode and the time 59 which the machine tool spends in idling mode. Finally, the total energy 50 is also composed of the partial energy 60 which the machine tool 2, 3 or 4 requires in the stand-by mode. The partial energy 60, in turn, results from the power 61 required in standby mode and the time 62 which the machine tool spends in standby mode. 6 shows an exemplary embodiment of a method according to the invention in the form of a flowchart.
  • method step 101 first of all a machine tool 2, 3 or 4 of a machine tool system 1 is fed with identical workpieces 5 for processing in time sequence.
  • the machine tool 2, 3 or 4 has an operating point-dependent machine cycle time and a power point-dependent power requirement.
  • the operating point 31, 44, 45 or 46 of the machine tool 2, 3 or 4 is varied, so that in method step 103 respectively the machine cycle time and the power requirement of the machine tool 2, 3 and 4 at the different operating points 31, 44 , 45, 46 can be detected.
  • a straight line 30 is adjusted by the different detected operating points 31, 44, 45, 46. This straight line represents the power demand characteristic curve 30.
  • the power demand characteristic curve 30 is used to determine the energy demand characteristic function 40 of the machine tool 2, 3 or 4.
  • the energy requirement identification function 40 represents, for example, a parabola 40.
  • an intersection 42 of the parabola 40 with the system clock time ti is determined.
  • an imaginary horizontal 48 is laid through the intersection 42. Based on the current machine cycle time now the actual operating point 31, 44, 45 and 46 of the machine tool 2, 3 and 4 is determined on the parabola 40. If the actual operating point 31, 44, 45 or 46 of the machine tool 2, 3 or 4 is below the horizontal 48, no energy saving is possible in step 109.
  • the machine tool 2, 3 or 4 is already in an energy-efficient operating point 31, 44, 45 and 46 while maintaining the current system clock time t-
  • REFERENCE CHARACTERS REFERENCE CHARACTERS

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Abstract

L'invention concerne un procédé pour déterminer un point de fonctionnement efficace sur le plan énergétique (31, 44, 45, 46) d'une machine-outil (2, 3, 4) d'un système de machines-outils (1), les mêmes pièces (5) pouvant être acheminées vers la machine-outil (2, 3, 4) successivement dans le temps en vue d'un usinage, la machine-outil (2, 3, 4) présentant un temps de cycle machine dépendant d'un point de fonctionnement et une puissance requise dépendant d'un point de fonctionnement, ledit système de machines-outils comprenant au moins deux machines-outils (2, 3, 4) et présentant un temps de cycle système (t1), le temps de cycle machine étant inférieur au temps de cycle système (t1). Le procédé selon l'invention est caractérisé en ce que le point de fonctionnement efficace sur le plan énergétique (31, 44, 45, 46) est déterminé conformément à une fonction caractéristique de consommation d'énergie de la machine-outil (2, 3, 4), la fonction caractéristique de consommation d'énergie représentant une consommation d'énergie dépendant du temps de cycle machine de la machine-outil (2, 3, 4) pendant le temps de cycle système (t1). L'invention concerne en outre un dispositif correspondant (9, 24) et un système de machines-outils (1).
PCT/EP2016/061530 2015-06-26 2016-05-23 Procédé et dispositif permettant de déterminer un point de fonctionnement efficace sur le plan énergétique WO2016206886A1 (fr)

Priority Applications (3)

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EP16726056.1A EP3314341B1 (fr) 2015-06-26 2016-05-23 Procédé et dispositif permettant de déterminer un point de fonctionnement efficace sur le plan énergétique
US15/738,254 US20180196411A1 (en) 2015-06-26 2016-05-23 Method and device for determining an energy-efficient operating point
JP2017567082A JP6993239B2 (ja) 2015-06-26 2016-05-23 エネルギ効率に優れた作動点を決定する方法及び装置

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DE102015211944.0A DE102015211944A1 (de) 2015-06-26 2015-06-26 Verfahren und Vorrichtung zur Ermittlung eines energieeffizienten Arbeitspunkts
DE102015211944.0 2015-06-26

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EP2650739A1 (fr) * 2012-04-13 2013-10-16 Krones AG Procédé et dispositif destinés à lýoptimisation d'un processus de production

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US20180196411A1 (en) 2018-07-12
DE102015211944A1 (de) 2016-12-29
JP6993239B2 (ja) 2022-01-13
EP3314341B1 (fr) 2023-01-25
JP2018519605A (ja) 2018-07-19
EP3314341A1 (fr) 2018-05-02

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